diff --git a/src/main/java/com/alibaba/druid/filter/logging/CommonsLogFilter.java b/src/main/java/com/alibaba/druid/filter/logging/CommonsLogFilter.java
index bb78744b26..ae84969a80 100644
--- a/src/main/java/com/alibaba/druid/filter/logging/CommonsLogFilter.java
+++ b/src/main/java/com/alibaba/druid/filter/logging/CommonsLogFilter.java
@@ -24,11 +24,6 @@ import org.apache.commons.logging.impl.Log4JLogger;
  */
 public class CommonsLogFilter extends LogFilter {
 
-    private String dataSourceLoggerName = "druid.sql.DataSource";
-    private String connectionLoggerName = "druid.sql.Connection";
-    private String statementLoggerName  = "druid.sql.Statement";
-    private String resultSetLoggerName  = "druid.sql.ResultSet";
-
     private Log    dataSourceLogger     = LogFactory.getLog(dataSourceLoggerName);
     private Log    connectionLogger     = LogFactory.getLog(connectionLoggerName);
     private Log    statementLogger      = LogFactory.getLog(statementLoggerName);
diff --git a/src/main/java/com/alibaba/druid/filter/logging/Log4jFilter.java b/src/main/java/com/alibaba/druid/filter/logging/Log4jFilter.java
index 88d6d7d2f3..d1bc1ec87f 100644
--- a/src/main/java/com/alibaba/druid/filter/logging/Log4jFilter.java
+++ b/src/main/java/com/alibaba/druid/filter/logging/Log4jFilter.java
@@ -23,15 +23,10 @@ import org.apache.log4j.Logger;
  */
 public class Log4jFilter extends LogFilter implements Log4jFilterMBean {
 
-    private String dataSourceLoggerName = "druid.sql.DataSource";
-    private String connectionLoggerName = "druid.sql.Connection";
-    private String statementLoggerName  = "druid.sql.Statement";
-    private String resultSetLoggerName  = "druid.sql.ResultSet";
-
-    private Logger dataSourceLogger     = Logger.getLogger(dataSourceLoggerName);
-    private Logger connectionLogger     = Logger.getLogger(connectionLoggerName);
-    private Logger statementLogger      = Logger.getLogger(statementLoggerName);
-    private Logger resultSetLogger      = Logger.getLogger(resultSetLoggerName);
+    private Logger dataSourceLogger = Logger.getLogger(dataSourceLoggerName);
+    private Logger connectionLogger = Logger.getLogger(connectionLoggerName);
+    private Logger statementLogger  = Logger.getLogger(statementLoggerName);
+    private Logger resultSetLogger  = Logger.getLogger(resultSetLoggerName);
 
     @Override
     public String getDataSourceLoggerName() {
diff --git a/src/main/java/com/alibaba/druid/filter/logging/LogFilter.java b/src/main/java/com/alibaba/druid/filter/logging/LogFilter.java
index 3617687d62..f695039ea4 100644
--- a/src/main/java/com/alibaba/druid/filter/logging/LogFilter.java
+++ b/src/main/java/com/alibaba/druid/filter/logging/LogFilter.java
@@ -37,6 +37,11 @@ import com.alibaba.druid.util.JdbcUtils;
  */
 public abstract class LogFilter extends FilterEventAdapter implements LogFilterMBean {
 
+    protected String          dataSourceLoggerName                 = "druid.sql.DataSource";
+    protected String          connectionLoggerName                 = "druid.sql.Connection";
+    protected String          statementLoggerName                  = "druid.sql.Statement";
+    protected String          resultSetLoggerName                  = "druid.sql.ResultSet";
+
     private boolean           connectionConnectBeforeLogEnable     = true;
     private boolean           connectionConnectAfterLogEnable      = true;
     private boolean           connectionCommitAfterLogEnable       = true;
diff --git a/src/main/java/com/alibaba/druid/filter/logging/Slf4jLogFilter.java b/src/main/java/com/alibaba/druid/filter/logging/Slf4jLogFilter.java
index 0863a55877..1357d696e5 100644
--- a/src/main/java/com/alibaba/druid/filter/logging/Slf4jLogFilter.java
+++ b/src/main/java/com/alibaba/druid/filter/logging/Slf4jLogFilter.java
@@ -5,15 +5,10 @@ import org.slf4j.LoggerFactory;
 
 public class Slf4jLogFilter extends LogFilter {
 
-    private String dataSourceLoggerName = "druid.sql.DataSource";
-    private String connectionLoggerName = "druid.sql.Connection";
-    private String statementLoggerName  = "druid.sql.Statement";
-    private String resultSetLoggerName  = "druid.sql.ResultSet";
-
-    private Logger dataSourceLogger     = LoggerFactory.getLogger(dataSourceLoggerName);
-    private Logger connectionLogger     = LoggerFactory.getLogger(connectionLoggerName);
-    private Logger statementLogger      = LoggerFactory.getLogger(statementLoggerName);
-    private Logger resultSetLogger      = LoggerFactory.getLogger(resultSetLoggerName);
+    private Logger dataSourceLogger = LoggerFactory.getLogger(dataSourceLoggerName);
+    private Logger connectionLogger = LoggerFactory.getLogger(connectionLoggerName);
+    private Logger statementLogger  = LoggerFactory.getLogger(statementLoggerName);
+    private Logger resultSetLogger  = LoggerFactory.getLogger(resultSetLoggerName);
 
     @Override
     public String getDataSourceLoggerName() {